Description: Delivering tremendous power at 1, 2, or 4 ohms, the Sundown SIA amps are built with power and stability at their core. These full-bridge amplifiers feature a heavy heatsink for outstanding thermal management, while the three-speed Smart Cooling fan and advanced power supply design protects the amplifier from overheating and distorted output. Made to bang all day long, by the world champions of bass! Features: 3,500 x 1 @ 1 ohm RMS 3,300 x 1 @ 2 ohms RMS 2,600 x 1 @ 4 ohms RMS Variable 12dB low pass filter: 40Hz-20kHz Variable 12dB high pass filter: 10Hz-1kHz Variable 12dB Bass Boost @ 50Hz Power, protection & clipping indicators included Thermal, voltage, speaker short, and dc-offset protection circuitry Advanced 3-speed fan design Subsonic filter Intelligent full bridge design Wired remote control with clipping indicator included Specifications: Input Sensitivity: 5V Max Amplifier Type: Full range mono 1 Ohm RMS Power: 3,500 x 1 @ 1 ohm RMS 2 Ohm RMS Power: 3,300 x 1 @ 2 ohms RMS 4 Ohm RMS Power: 2,600 x 1 @ 4 ohms RMS Operation Voltage: 10.5V – 15.5V DC Recommended Fuse: 300A Signal / Noise Ratio: 108dB Variable 12dB High Pass Filters: 10Hz-1kHz Variable 12dB Low Pass Filters: 40Hz-20kHz Dimensions: Length: 10.43" Width: 8.86" Height: 2.68"